import {CHANGE_INPUT_VALUE,ADD_TODO_ITEM,DELETE_TODO_ITEM,INIT_LIST_ACTION} from './actionTypes'

const defaultState ={
    inputValue:'',
    list:[]
}

export default (state = defaultState, action)=> {
    if(action.type===CHANGE_INPUT_VALUE){
        const newState = JSON.parse(JSON.stringify(state));
        newState.inputValue = action.value;
        return newState;
    }
    if (action.type ===ADD_TODO_ITEM) {
        const newState = JSON.parse(JSON.stringify(state));
        newState.list.push(newState.inputValue);
        newState.inputValue = '';
        return newState;
    }
    if (action.type ===DELETE_TODO_ITEM) {
        const newState = JSON.parse(JSON.stringify(state));
        newState.list.splice(action.index,1);
        return newState;
    }
    if (action.type ===INIT_LIST_ACTION) {
        const newState = JSON.parse(JSON.stringify(state));
        newState.list = action.data;
        return newState;
    }
    return state
}